An inter-electrode plate capable of storing cooling liquid, a battery pack module and a battery pack

Abstract

The utility model discloses a kind of battery cell spacer plate that can store coolant, battery pack module and battery pack, and battery cell spacer plate includes spacer plate plate body, the spacer plate plate body has the hollow liquid storage area of coolant storage and the flow guide hole for the coolant flowing into the hollow liquid storage area on it.The utility model integrates heat dissipation and liquid storage function, compared with traditional external complex heat dissipation system, can effectively reduce the overall volume and weight of battery module, help to improve the energy density of battery module, meet the demand of high energy density of battery for electric vehicle, energy storage power station etc.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cell separator capable of storing coolant, a battery pack module, and a battery pack. Background Technology

[0002] In square lithium battery modules, the stable operation of the cells is crucial to the overall battery performance. As the application scenarios of lithium batteries continue to expand, such as their widespread use in electric vehicles and energy storage power stations, the requirements for heat dissipation of lithium batteries are increasing.

[0003] Existing square lithium-ion battery cell spacers are mostly simple insulating structures, only providing electrical isolation and mechanical support between cells. In actual use, when lithium batteries are under high load, the cells generate a large amount of heat. If heat cannot be dissipated effectively in time, the cell temperature will continue to rise, leading to a decline in battery performance, such as capacity decay and reduced charge / discharge efficiency. In severe cases, it can even cause thermal runaway, resulting in safety accidents. For example, during high-speed driving or frequent fast charging of electric vehicles, the cell temperature within the battery module rises sharply, and traditional spacers cannot effectively manage the heat, significantly impacting battery performance.

[0004] Meanwhile, current battery cooling systems mostly employ external cooling pipes or heat sinks. These systems are complex in structure, occupy a large amount of space, and increase the overall size and weight of the battery module, which is detrimental to improving battery energy density. Moreover, during battery operation, replenishing coolant often requires stopping the machine and disassembling the battery module, which is cumbersome and seriously affects the convenience of battery use and the continuity of operation. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cell spacer that can store coolant, thereby improving the heat dissipation and cooling performance of the battery pack.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0007] A cell spacer for storing coolant includes a spacer plate body, the spacer plate body having a perforated storage area for storing coolant and a guide hole for the coolant to flow into the perforated storage area.

[0008] Preferably, the flow guide hole is located at the top of the spacer plate.

[0009] Preferably, the partition plate has an overflow port for the coolant to be discharged from the hollowed-out liquid storage area.

[0010] Preferably, it also includes a sealant layer adhered to both sides of the surface of the spacer plate.

[0011] Preferably, the sealant layer is an EVA foam layer.

[0012] Preferably, the hollowed-out liquid storage area is located in the middle of the spacer plate.

[0013] This utility model also provides a battery pack module, including a plurality of battery cells, and a battery cell spacer plate as described above located between adjacent battery cells.

[0014] This utility model also provides a battery pack, including a sealed housing and a plurality of battery pack modules, wherein the battery pack modules are as described above.

[0015] Preferably, the sealing housing has an inlet for the coolant to enter the sealing housing and an outlet for the coolant to exit the sealing housing.

[0016] Preferably, the liquid inlet is located at the upper part of the sealing housing, and the liquid outlet is located at the lower part of the sealing housing.

[0017] The advantages of this utility model compared with the prior art are:

[0018] This invention enables real-time heat dissipation of the battery cells, effectively controlling cell temperature and improving battery performance and safety. Simultaneously, it features convenient coolant storage and replenishment, allowing coolant replenishment without disassembling the battery module, thus enhancing battery usability and operational continuity. Integrating heat dissipation and coolant storage functions, this invention effectively reduces the overall size and weight of the battery module compared to traditional external complex heat dissipation systems, contributing to increased energy density and meeting the high energy density requirements of electric vehicles and energy storage power stations.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a cell spacer that can store coolant in this embodiment.

[0022] Figure 2 This is a schematic diagram of the structure of a cell spacer that can store coolant in this embodiment.

[0023] Figure 3 This is a schematic diagram of the battery pack module in this embodiment.

[0024] Explanation of the markings in the image:

[0025] 1. Cell spacer; 11. Drainage hole; 12. Hollowed-out liquid storage area; 13. Overflow port; 14. Sealing layer;

[0026] 2. Battery cells;

[0027] 3. Coolant. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0030] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] like Figures 1-3 As shown, this embodiment is a cell spacer plate that can store coolant. The cell spacer plate includes a spacer plate body 1, which has a hollowed-out liquid storage area 12 for storing coolant and a guide hole 11 for the coolant to flow into the hollowed-out liquid storage area 12.

[0033] In this embodiment, coolant can be injected and stored in the hollowed-out storage area 12 through the guide hole 11, which can cool and dissipate heat for the cells 2 on both sides of the separator. Moreover, the hollowed-out structure design can reduce the weight of the separator plate 1 and reduce the overall weight of the battery module.

[0034] The hollowed-out liquid storage area 12 can transfer the heat generated by the battery cell to the coolant in a timely manner, and achieve efficient heat dissipation through the penetration and circulation of the coolant, effectively reducing the battery cell temperature, reducing battery performance degradation caused by high temperature, extending battery life, improving battery safety, and avoiding the risk of thermal runaway.

[0035] In one embodiment, the flow guide hole 11 is formed on the top of the spacer plate 1.

[0036] In this embodiment, the guide hole 11 can be set on the top of the partition plate 1. When coolant is injected, the coolant flows automatically into the hollowed-out liquid storage area 12 through the guide hole 11 on the top under the action of gravity.

[0037] This embodiment provides space for coolant storage and circulation, facilitating heat dissipation. A dedicated injection device can be used to inject coolant through the top guide hole into the storage space within the hollowed-out storage area 12.

[0038] In one embodiment, the spacer plate 1 has a raised frame. This is used to isolate adjacent battery cells, effectively preventing electrical short circuits and mechanical friction between the cells.

[0039] In one embodiment, the partition plate 1 is provided with an overflow port 13 for the coolant to be discharged from the hollowed-out liquid storage area 12.

[0040] When there is an excess of coolant in the partition plate 1 or when the coolant needs to be replaced and drained after heat exchange, the coolant in the hollowed-out reservoir area 12 can flow out from the overflow port 13 when the height of the coolant reaches the overflow port 13.

[0041] To prevent coolant leakage, in one embodiment, a sealant layer is further included, which is adhered to both sides of the spacer plate 1. The sealant layer 14 is adhered to both sides of the spacer plate 1, and the sealant layer is tightly bonded to the battery cell 2 to form a sealed structure, ensuring that coolant does not leak out during operation.

[0042] In this embodiment, the sealant layer can be made of various sealants. In one embodiment, the sealant layer is an EVA foam layer.

[0043] In one embodiment, the hollowed-out liquid storage area 12 is located in the middle of the spacer plate 1.

[0044] This embodiment also provides a battery pack module, including a plurality of battery cells 2, and a battery cell 2 spacer plate as described above located between adjacent battery cells 2.

[0045] This embodiment also provides a battery pack, including a sealed housing and a plurality of battery pack modules, wherein the battery pack modules are as described above.

[0046] In one embodiment, the sealing housing has an inlet for the coolant to enter the sealing housing and an outlet for the coolant to exit the sealing housing.

[0047] To facilitate coolant injection into the battery pack, an inlet can be provided on the sealed housing for coolant injection. Alternatively, several pipes can be installed inside the housing to deliver coolant to each spacer plate. This allows for convenient replenishment of coolant in the reservoir during battery operation without disassembling the battery module, greatly improving battery usability and operational continuity, and reducing maintenance costs and downtime.

[0048] In one embodiment, the liquid inlet is located at the upper part of the sealing housing, and the liquid outlet is located at the lower part of the sealing housing.

[0049] In this embodiment, the coolant can enter the battery pack through the inlet at the top of the sealed housing, flow from top to bottom through the guide hole 11 into the hollowed-out storage area 12 for cooling, and when the coolant after heat exchange needs to be discharged, it can be discharged through the overflow port 13 into the lower part of the battery pack, and finally discharged through the drain port at the bottom of the sealed housing.

[0050] When assembling a battery module: place the battery cells (such as square lithium battery cells) on both sides of the spacer, then connect multiple spacers in sequence to form a battery module frame, and then perform subsequent electrical connections and fixing and other assembly steps.

[0051] Heat dissipation operation: When the battery module is working, the heat generated by the cells is transferred to the plate through the thermally conductive layer. Some of the heat is dissipated through air circulation, while the rest is transferred to the coolant reservoir. The coolant in the reservoir absorbs heat, its temperature rises, and it slowly permeates through tiny pores to the area around the cells, carrying away heat from the cell surface and achieving heat dissipation and cooling. Simultaneously, the coolant exchanges heat with the heat dissipation fins within the reservoir, further enhancing the heat dissipation effect. When the coolant level in the reservoir is insufficient, it can be replenished according to the coolant storage procedure.

[0052] When the above-mentioned spacer is applied in specific applications, it can be used in multiple scenarios, such as:

[0053] 1. Electric vehicle battery module: The spacer of this utility model can be applied to the battery module of an electric vehicle to effectively deal with the large amount of heat generated by the frequent charging and discharging of the battery during the driving process. By timely heat dissipation, the battery performance is stabilized, the driving range and power performance of the electric vehicle are improved, and the safety hazards caused by battery overheating are reduced, thereby improving the overall safety of the electric vehicle.

[0054] 2. Energy Storage Power Stations: In energy storage power stations, batteries need to be in a charge-discharge cycle state for a long time, placing extremely high demands on battery heat dissipation and stability. This invention can dissipate heat from the battery cells in real time, ensuring that the energy storage battery maintains good performance under different operating conditions, improving the energy storage efficiency and operational reliability of the energy storage power station, and reducing maintenance costs.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cell spacer capable of storing coolant, comprising a spacer plate body, characterized in that, The partition plate has a hollowed-out liquid storage area for storing coolant and a guide hole for the coolant to flow into the hollowed-out liquid storage area; the guide hole is opened at the top of the partition plate.

2. The cell spacer capable of storing coolant according to claim 1, characterized in that, The partition plate has an overflow port for the coolant to be discharged from the hollowed-out liquid storage area.

3. The cell spacer capable of storing coolant according to claim 1, characterized in that, It also includes a sealant layer that is adhered to both sides of the surface of the partition plate.

4. The cell spacer capable of storing coolant according to claim 3, characterized in that, The sealant layer is an EVA foam adhesive layer.

5. The cell spacer capable of storing coolant according to any one of claims 1 to 4, characterized in that, The hollowed-out liquid storage area is located in the middle of the spacer plate.

6. A battery pack module comprising a plurality of battery cells, characterized in that, It also includes a cell spacer as described in any one of claims 1 to 5 located between adjacent cells.

7. A battery pack, comprising a sealed housing and a plurality of battery pack modules, characterized in that, The battery pack module is the battery pack module as described in claim 6.

8. The battery pack according to claim 7, characterized in that, The sealing housing has an inlet for the coolant to enter the sealing housing and an outlet for the coolant to exit the sealing housing.

9. The battery pack according to claim 8, characterized in that, The liquid inlet is located on the upper part of the sealing housing, and the liquid outlet is located on the lower part of the sealing housing.

Images